在微环境调制的HKUST-1上使用丰富的Cu (I) 站点提高吸附脱硫性能.
Ping Lu1,2,3, Zhaoyang Qi2,3, Jie Chen1,2,3
1School of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|August 11, 2023
概括
一种新方法增强了金属有机框架 (MOFs) 以有效地从燃料中去除硫化合物. 这种方法创造了更多活跃的地点,大大提高了超出现有材料的硫吸附能力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 液态碳化合物燃料的吸附性脱硫对于环境保护至关重要.
- 金属有机框架 (MOFs) 显示出脱硫的前景,但经常遭受惰性金属站点的损害.
- 调节MOF微环境是提高吸附效率的关键.
研究的目的:
- 开发一种新的方法来提高MOF的脱硫性能.
- 在MOF中创建丰富的高效Cu (I) 和Cu-协调不和场所.
- 改善吸附位点周围的孔隙结构,以更好地捕获硫化合物.
主要方法:
- 利用(III) 作为一个分子工具来调节HKUST-1 (一种MOF) 的协调微环境.
- 制造的增强MOF结构 (CH-250) 具有改进的Cu (I) 和Cu-协调不和位点.
- 研究了修改后的MOFs对芳香硫化合物的吸附能力和亲和力.
主要成果:
- 最佳的CH-250 MOF显示出对蒂奥芬 (20.2 mg S g - 1),佐-蒂奥芬 (28.0 mg S g - 1) 和二索提奥芬 (58.3 mg S g - 1) 的优越吸附能力.
- 与原始Cu(II) 位相比,改造的Cu(I) 位表现出较强的二西欧芬吸附亲和力.
- 在修改后的MOF上观察到二西欧芬在平面内显著增强的吸附相互作用.
结论:
- Ce增强调制是制造用于吸附脱硫的高性能MOF的有效策略.
- 设计的MOF显著优于现有的材料,如热利石和纳米孔状碳.
- MOF协调微环境的分子工程对于深度脱硫应用具有很大的潜力.
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